Retusidae is a

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

of very small

sea snail Sea snails are slow-moving marine (ocean), marine gastropod Mollusca, molluscs, usually with visible external shells, such as whelk or abalone. They share the Taxonomic classification, taxonomic class Gastropoda with slugs, which are distinguishe ...

s, barrel-bubble snails, marine

opisthobranch Opisthobranchs () is a now informal name for a large and diverse group of specialized complex gastropods which used to be united in the subclass Opisthobranchia. That taxon is no longer considered to represent a monophyletic grouping. Euopistho ...

gastropod Gastropods (), commonly known as slugs and snails, belong to a large Taxonomy (biology), taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, freshwater, and fro ...

mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The ...

s. These are headshield slugs, in the superfamily

Bulloidea Bulloidea is a superfamily of sea snails, or bubble snails, marine gastropod mollusk Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of ...

.Bouchet, P. (2012). Retusidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=156 on 2012-08-19

Genera

Genera within the family Retusidae include: * '' Pyrunculus'' Pilsbry, 1895 * '' Relichna'' Rudman, 1971 * '' Retusa'' T. Brown, 1827 * '' Sulcoretusa'' J.Q. Burch, 1945 ;Genera brought into synonymy: * ''Coleophysis'': synonym of ''Retusa'' T. Brown, 1827 * ''Cylichnina'' Monterosato, 1884: synonym of ''Retusa'' T. Brown, 1827 * ''Mamilloretusa'' F. Nordsieck, 1972 accepted as ''Retusa'' T. Brown, 1827 * ''Sao'' H. Adams & A. Adams, 1854 accepted as ''Pyrunculus'' Pilsbry, 1895 * ''Sulcularia'' Dall, 1921 accepted as ''Sulcoretusa'' J.Q. Burch, 1945 * ''Utriculus'' T. Brown, 1844 accepted as ''Retusa'' T. Brown, 1827

References

* Powell A. W. B., ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979 Retusa leptoeneilema 01

External links

Miocene Gastropods and Biostratigraphy of the Kern River Area, California; United States Geological Survey Professional Paper 642

Serge GOFAS, Ángel A. LUQUE, Joan Daniel OLIVER, José TEMPLADO & Alberto SERRA (2021) - The Mollusca of Galicia Bank (NE Atlantic Ocean); European Journal of Taxonomy 785: 1–114
{{Heterobranchia-stub